Hardly anyone can prep properly, mask or dropcloth properly, cut in around trim and windows, get even coverage, etc. 

I see investors all over the country making 30%+ cash-on-cash return, BUT there are also people throwing money out of the window.

I don't think you are going to be able to get insurance for two separate living units in a single-family when they are both illegal and likely do not have the correct egress windows (basement) for fire safety which could subject you to huge liability if something happens to either party.

My secret is I use the one-hour window to allow cancellation.

They reported a window sill being taken off and it would appear someone broke in over the Christmas week.

This has pluses and minuses.If your property is bulletproof such as no framing - cinder block construction, cement floors, gloss white paint slapped on the walls and a cheap window mount AC, then you are in a prime position to make money with S8. 

Not interested in installing new flooring or new windows.

Hey Tyler we hate to hear that your experience was negative sincerely we would have hoped that we could have come to a resolution we know that you and your partner had made a request that we do $800 of work that was unfortunately not in your scope of work at the time we had exhausted $4900 in additional work to ensure the property was to satisfaction which included a new hood range upgraded lvp flooring additional framing  new window and a paint upgrade from a single color format to a multi color format and can lighting all of which was never in the original scope and unfortunately when we requested that we do the work you declined I’ve attached before and after videos of the home for reference https://www.dropbox.com/scl/fi/h0ddll4cyp5g5gq12o73s/Video-J... always twos sides to these stories.. 

Window AC units can indeed be treated as tangible personal property with a 5-yr life and be bonus-depreciated or deducted under Section 179. 

It's an A-framed garage with shingles roof, gutters, windows, and a 32" exterior door (in addition to a 16' operating face door).